Force-pump.



PATBNTED FEB. 26, 1907- v F. GIROD.

01m: PUMP. APPLICATION FILED KAI- .16. 1906.

FRANZ GIROD, OF MANNHEIM, GERMANY.

FORCE-PUMP.

Specification of Letters Patent.

Patented Feb. 26, 1907.

Application filed January 16, 1906. Serial No. 296,285.

To all whom, it may concern:

Be it known that I, FRANZ GIROD, a civil engineer, and a subject of the German Emperor, and a resident of Mannheim, Germany, Rheinanstrasse 24, have invented a certain new and useful Pressure-Pulsometer or Forcel?ump, of which the following is a specification.

This invention has reference to that class of force pumps which are known in the chemical industries as pulsometers or monte-jus and which are used in the arts for the raising of liquids of various kinds and in particular of acids or other liquids which do not admit of treatment by steam or by other pressure fluids directly.

The invention is distinguished from the devices of this class as heretofore employed by the fact that in this device the float usually employed heretofore for operating the pressure-fluid-controlling valve is dispensed with, and, furthermore, by so arranging and constructing the apparatus that the controllingvalve for the admission of the pressure fluid will readily respond to the change of pressure in the interior of the apparatus, the valveopening pressure being created in the interior of the apparatus toward the end of the feeding period only, by which means it is possible to operate the apparatus with a relatively low pressure as compared with the apparatuses of this kind in use heretofore, and it is also possible to prevent the access of injurious vapors to the controlling-valve, the said vapors being discharged during the feed ing period by a special vent-opening.

Upon the accompanying drawings the invention is shown, by way of example, in two forms of construction in vertical section in Figures 1 and 3, respectively. Figs. 2 and 4 are representations, on a larger scale, of the controlling-valves for the admission of the pressure fluid in vertical section, Fig. 2 showing the valve employed in the modification Fig. 1 and Fig. 4 showing the valve employed with the modification shown in Fig. 3.

The apparatus in its essential parts comprises a pressure tank or receiver a, which is connected to the storage or feeding tank dby means of a conduit 1), in which a check-valve c is arranged. The pressure-tank a is connected, by means of a vertical pipe 6, to the pressure-fluid-controlling valve f, arranged at'a higher level than the pressure-tank a. From the pressure-tank a the pipe-conduit g leads the liquid to the discharge-tank p. The

l l l tube of communication h, which will be more particularly referred to hereinafter, connects the upper part of the interior of the pressuretank awith the interior of the liquid-delivery conduit 9.

The apparatus operates as follows: The controlling-valve, which in the form of construction illustrated in Figs. 1 and 2 of the drawings consists of a hollow cylinder '6, closed at the top, will be in the lowest position (indicated in dotted lines in the drawings) when the apparatus is started. In this position the valve will shut the small admissionopenings m, provided in the wall of the valvecasing is, each. opening or port having, for instance, a diameter of from one-tenth to fifteen-hundredths of an inch, (three to four millimeters.) I prefer to provide three or more of these openings or ports m, which serve for the admission of the pressure fluidof compressed air, for instancewhich enters into the valve through the annular passage n, which is connected to'the source of pressure fluid by the tubing 0. The pressuretank into which the pressure fluid is delivered through the ports m communicates with the outside atmosphere by means of the liquid-raising pipe g. By the pressure of the li uid flowing out from the feeding-tank d, w iich is arranged at a higher level, the checkvalve 0 is opened and the pressure-tank a, is

filled with liquid. Nhen the liquid rises above the upper end of the tube of communication h, the said tube is filled with liquid, while the air which has remained in the pressure-tank a after the escape of the greater part of the air contained in said tank through the tube of communication it is prevented from escaping. In consequence of the high level of the feeding-tank d the liquid in the pressure-tank will be subjected to a certain pressure, and the air remaining in the pressure-tank a is compressed thereby. When the compression has attained a certain degree, the valve i is raised and is forced against the upper seat of the valve-body. The openings m are disclosed thereby, and the pressure fluid is admitted. In consequence of the action of the pressure fluid the check-valve 0 is closed, and the liquid is thereby forced from the tube of communication it and from the pressuretank a into the liquidraising conduit 9 and is discharged into the tank p or into or upon some other piece of apparatus placed at a high level and which it is desired to feed with the liquid. When the modification of valve will last part of the liquid has passed out from the vertical part of the liquid-raising pipe g, the liquid in the descending leg of the said conduit 9 produces a sucking action, so as to enable the compressed pressure fluid to expand freely. After the liquid has been entirely discharged into the receptacle 1) the pressure in the pressure-tank a is reduced to nearly the pressure of the outside air, inas I much as the compressed pressure fluid in view of the small diameter of the entranceopenings m is unable to enter at such speed and in the same proportion as it escapes through the liquid-raising conduit 9 of comparatively large diameter. The valve 'i will then drop down by gravity and at the same time the check-valve 0 will be opened, so that another feeding period sets in, whereupon the order of operations described is repeated.

The button (shown in the drawings at the upper end of the valve-stem) is intended to act as a stop to limit the stroke of the down ward movement of the valve 2 Through the small tube 0 or through the small tube 7 lubrication of the valve may be effected, so as to obtain a better and tighter fit and to enable the valve to move easily within its housing. Lubrication may be effected by the same liquid which it is desired to raise or by water, this very minute quantity of liquid being unable to influence the strength of the liquid to be raised by the apparatusof sulfuric acid, for instance.

Figs. 3 and 4 represent a somewhat modified construction of the pulsometer in which a different construction of valve is used. In this modification the valve comprises a flexible membrane 1;, which is kept in position by a lever x, which is suitably connected to the controlling-valve of the pressure-fluid conduit w, the movement of the membrane consequent upon the change of pressure in the interior of the pressuretank a causing a corresponding movement of the said lever and of the admission-valve to which the lever is connected. The stem of the admission-valve is indicated at s in the drawings. In this modification the pressure fluid enters into the pressure-tank a through the connecting-pipe 2, while the pressure fluid is admitted through the pipe w. The lever 91: is weighted in order to impart the necessary weight to the controlling-valve. The said modification illustrated in Figs. 3 and 4 of the drawings will be found preferable some cases to the construction of valve t (illustrated in Figs. 1 and 2,) which construction is more complicated and which valve is heavier than the valve shown in Figs. 3 and 4. When the membrane is made of acid-proof and otherwise resisting material, this latter be found very suitable where acids evolving strong vapors are to be dealt with.

may of course use any kind of pressure 1 fluid other than compressed air, and I may also change the shape or configuration of the different parts of the apparatus without departing from the spirit of my invention.

The empty tube of communication It constitutes an essential part of my invention. It operates as a vent-orifice for the escape of the air and of the vapors of the liquid during the filling period, and it is preferably arranged in the interior of the liquid-raising pipe so as to eflect the shutting-off of the apparatus during the liquid-delivery period by its being sealed by the liquid to be raised, this closure being independent of any variations of pressure of the pressure fluid, and by this means I am also enabled to use the vent-tube It as part of the liquid-raising and liquid-delivery pipe also and to prevent vapors of the liquid from entering into the room during the operation of the apparatus. Furthermore than that, I am also enabled by this means to hasten the discharge of the liquid from the pressure-tank by employing the vent-tube for the well-known purpose of mixing the pressure fluidcompressed air, for instance with the liquid which escapes through the liquid-raising pipe 9. The vent-tube h also serves for preventing corrosions of the valve mechanism by the vapors of the liquid, and it prevents fluttering of the valve, inasmuch as the valve operating compression of the air in the vessel a is thereby only produced after the said vessel has been almost filled and after the tube h has been sealed and filled by the liquid to be raised itself.

I am aware of U-shaped upright tubes having been used before in connection with forcepumps, blow-cases, or the like as a means for regulating the pressure of the air compressed by the entering liquid, such U-tubes having then been filled with a sealing liquid in order to create a raising pressure by the forcing up of such supply of sealing liquid, such U-tubes either with or without a sealing liquid operating in connection with floats as a means to open and close the pressure-fluid-admittingports; but this is entirely different from my invention where no float which would have to be changed according to every change of density of the liquid is used and where the fluid-admitting valve in order to be able to operate it by a slight inside pressure is exposed at the outside to the atmosphere, while the U-shaped tube acts as a means for carrying off the noxious vapors of the entering liquid and is empty and forms part of the liquid discharge and raising conduit and can be carried to a great height within the pressure-tank in view of the very slight pressure produced in the tank when it is nearly filled with liquid, being already sufficient to operate the valve.

What I claim, and desire to secure by Letters Patent of the United States, is-

1. Pressure-pulsometer, comprising the combination with a liquid-storage tank and a pressure-tank and valve-controlled connections between said tanks and an upright empty, open-ended U-shaped pipe connected to said pressure-tank, of an ascending dis charge and liquid-delivery pipe, entirely at the outside of said pressure-tank and connected to the lower part of the same and continuous with and surrounding one leg of said U-shaped pipe, an inside pressure-operated, pressure-fiui ;l-admitting valve connected to said pressure-tank, and exposed to outer atmospheric pressure.

2. In a pressure-pulsometer in combination, a pressure-tank, a liquiu-storage tank, a valve-controlled liquid-admitting pipe con nected to the bottom part of said pressuretank, an empty, upwardly-directed U-shaped pipe, having one leg at the interior of said pressure-tank, a liquid discharge and delivery pipe starting from the base part of said pressure-tank and surrounding the other leg of said U-shaped pipe of narrower diameter and forming the continuation of the same, an inside pressure controlled, outwardly exposed, pressure-fluid-admitt-mg valve, and pipe connections between said valve and the pressure-tank and a lubricating-passage at the outside of said valve.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANZ GIROD.

Witnesses:

WOLDEMAR HAUPT, HENRY I-IAsPER. 

